M278 chain noise

[S500 Pete]

Hi, My M278 (4.7 V8 biturbo) rattles for about 10 seconds on start up from cold.

I have just read this on the web:

Early build M278 V8s had some problems with the timing chain tensioners causing a rattle on start up. The engine has a pretty complicated timing chain drive arrangement. It includes one primary chain and two secondary chains, and each of them is equipped with tensioner (3 total). If not pay attention to knocks/noise for a long time, this may lead to the replacement of the entire chain drive system together with cam adjusters. There were some reports of engine oil starvation due to the failure of the oil pump drive gear (oil pump is driven via a chain).

Does anybody know how true this is and if it is what do they mean by early models, mine is a 2014?

 

[Blobcat]

I think @star posted about this, I’m sure he’ll know

 

[brandwooddixon]

I would like to think that your engine may be one of the later ones.
Engine 278: Up to engine 2789xx 30 103675.

There was a service bulletin regarding oil return check valves and tensioners: https://static.nhtsa.gov/odi/tsbs/2014/MC-10135974-9999.pdf

 

[S500 Pete]

I would like to think that your engine may be one of the later ones.
Engine 278: Up to engine 2789xx 30 103675.

There was a service bulletin regarding oil return check valves and tensioners: https://static.nhtsa.gov/odi/tsbs/2014/MC-10135974-9999.pdf

Thanks, I will look for my engine number.

 

[S500 Pete]

I would like to think that your engine may be one of the later ones.
Engine 278: Up to engine 2789xx 30 103675.

There was a service bulletin regarding oil return check valves and tensioners: https://static.nhtsa.gov/odi/tsbs/2014/MC-10135974-9999.pdf

Thanks, I will look for my number. The service note is dated at the same date as mine was registered so I am on the cusp of the change.